Chilkat for Delphi Downloads

uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, OAuth2;
...
procedure TForm1.Button1Click(Sender: TObject);
var
oauth2: HCkOAuth2;
success: Boolean;
url: PWideChar;
numMsWaited: Integer;
begin// This example requires the Chilkat API to have been previously unlocked.// See Global Unlock Sample for sample code.
oauth2 := CkOAuth2_Create();
// The port should match the Authorized Redirect URL in your LinkedIn app, // which would look like "http://localhost:3017/"CkOAuth2_putListenPort(oauth2,3017);
CkOAuth2_putAuthorizationEndpoint(oauth2,'https://www.linkedin.com/oauth/v2/authorization');
CkOAuth2_putTokenEndpoint(oauth2,'https://www.linkedin.com/oauth/v2/accessToken');
// Replace these with actual values.CkOAuth2_putClientId(oauth2,'LINKEDIN-CLIENT-ID');
CkOAuth2_putClientSecret(oauth2,'LINKEDIN-CLIENT-SECRET');
CkOAuth2_putCodeChallenge(oauth2,False);
// Begin the OAuth2 three-legged flow. This returns a URL that should be loaded in a browser.
url := CkOAuth2__startAuth(oauth2);
if (CkOAuth2_getLastMethodSuccess(oauth2) <> True) thenbegin
Memo1.Lines.Add(CkOAuth2__lastErrorText(oauth2));
Exit;
end;
// At this point, your application should load the URL in a browser.// For example, // in C#: System.Diagnostics.Process.Start(url);// in Java: Desktop.getDesktop().browse(new URI(url));// in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")// wsh.Run url// The LinkedIn account owner would interactively accept or deny the authorization request.// Add the code to load the url in a web browser here...// Add the code to load the url in a web browser here...// Add the code to load the url in a web browser here...// Now wait for the authorization.// We'll wait for a max of 30 seconds.
numMsWaited := 0;
while (numMsWaited < 30000) and (CkOAuth2_getAuthFlowState(oauth2) < 3) dobeginCkOAuth2_SleepMs(oauth2,100);
numMsWaited := numMsWaited + 100;
end;
// If there was no response from the browser within 30 seconds, then // the AuthFlowState will be equal to 1 or 2.// 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.// 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.// In that case, cancel the background task started in the call to StartAuth.if (CkOAuth2_getAuthFlowState(oauth2) < 3) thenbeginCkOAuth2_Cancel(oauth2);
Memo1.Lines.Add('No response from the browser!');
Exit;
end;
// Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred// The possible AuthFlowState values are:// 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.// 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.// 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.if (CkOAuth2_getAuthFlowState(oauth2) = 5) thenbegin
Memo1.Lines.Add('OAuth2 failed to complete.');
Memo1.Lines.Add(CkOAuth2__failureInfo(oauth2));
Exit;
end;
if (CkOAuth2_getAuthFlowState(oauth2) = 4) thenbegin
Memo1.Lines.Add('OAuth2 authorization was denied.');
Memo1.Lines.Add(CkOAuth2__accessTokenResponse(oauth2));
Exit;
end;
if (CkOAuth2_getAuthFlowState(oauth2) <> 3) thenbegin
Memo1.Lines.Add('Unexpected AuthFlowState:' + IntToStr(CkOAuth2_getAuthFlowState(oauth2)));
Exit;
end;
Memo1.Lines.Add('OAuth2 authorization granted!');
Memo1.Lines.Add('Access Token = ' + CkOAuth2__accessToken(oauth2));
CkOAuth2_Dispose(oauth2);
end;